<template>
  <div class="swiper" ref="mySwiper">
    <div class="swiper-wrapper" @click="changeShowImg">
      <div
        class="swiper-slide"
        :class="{ active: activeIndex == index }"
        v-for="(skuImg, index) in skuImageList"
        :key="skuImg.id"
      >
        <img :src="skuImg.imgUrl" :data-index="index" />
      </div>
    </div>
    <div class="swiper-button-prev"></div>
    <!--左箭头。如果放置在swiper外面，需要自定义样式。-->
    <div class="swiper-button-next"></div>
    <!--右箭头。如果放置在swiper外面，需要自定义样式。-->
  </div>
</template>

<script>
import Swiper from 'swiper/bundle'
import 'swiper/css/bundle'
export default {
  name: 'ImageList',
  props: {
    skuImageList: Array,
  },
  data() {
    return {
      activeIndex: 0,
    }
  },
  methods: {
    changeShowImg(e) {
      const { index } = e.target.dataset
      const { src } = e.target
      if (!index) return
      this.$bus.$emit('change-img', src)
      this.activeIndex = index
    },
  },
  watch: {
    async skuImageList() {
      await this.$nextTick()
      new Swiper(this.$refs.mySwiper, {
        spaceBetween: 30,
        speed: 500,
        slidesPerView: 'auto',
        slidesPerGroup: 1,
        navigation: {
          nextEl: '.swiper-button-next',
          prevEl: '.swiper-button-prev',
        },
      })
    },
  },
}
</script>

<style lang="less" scoped>
.swiper {
  height: 56px;
  width: 402px;
  box-sizing: border-box;
  padding: 0 12px;
  margin: 0;

  .swiper-slide {
    width: 56px;
    height: 56px;
    cursor: pointer;
    img {
      width: 100%;
      height: 100%;
      border: 1px solid #ccc;
      padding: 2px;
      width: 50px;
      height: 50px;
      display: block;

      &.active {
        border: 2px solid #f60;
        padding: 1px;
      }

      &:hover {
        border: 2px solid #f60;
        padding: 1px;
      }
    }
  }

  .swiper-button-next {
    left: auto;
    right: 0;
  }

  .swiper-button-prev {
    left: 0;
    right: auto;
  }

  .swiper-button-next,
  .swiper-button-prev {
    box-sizing: border-box;
    width: 12px;
    height: 56px;
    background: rgb(235, 235, 235);
    border: 1px solid rgb(204, 204, 204);
    top: 0;
    margin-top: 0;
    &::after {
      font-size: 12px;
    }
  }
}
</style>
